Dualcaster Mage + Sevinne's Reclamation + Bloodthrone Vampire

Dualcaster Mage

Sevinne's Reclamation

Bloodthrone Vampire

How it works

1. Cast Sevinne's Reclamation by paying its mana cost, targeting any applicable target.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Sevinne's Reclamation.
4. Holding priority, activate Bloodthrone Vampire by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Sevinne's Reclamation, with the copy targeting Dualcaster Mage
6. Resolve the Sevinne's Reclamation copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This ingenious loop begins by casting Sevinne's Reclamation from your hand to prime the graveyard, then dropping Dualcaster Mage with flash to intercept your own spell with a copied Reclamation. As the copy resolves, it pulls Dualcaster Mage straight back out of your graveyard via Sevinne's Reclamation's return effect, ready to copy the original spell once more. Meanwhile, Bloodthrone Vampire provides the essential sacrifice outlet to cleanly send Dualcaster Mage back to the graveyard to restart the loop, translating this recursive spell-copying engine into infinite death triggers and an infinitely massive vampire.